US 12,318,127 B2
Endoscope treatment tool
Ryo Ishikawa, Kanagawa (JP); and Jun Sato, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Dec. 20, 2020, as Appl. No. 17/128,180.
Application 17/128,180 is a continuation of application No. PCT/JP2019/024527, filed on Jun. 20, 2019.
Claims priority of application No. 2018-137453 (JP), filed on Jul. 23, 2018.
Prior Publication US 2021/0106375 A1, Apr. 15, 2021
Int. Cl. A61B 18/14 (2006.01); A61B 18/00 (2006.01); A61B 90/00 (2016.01)
CPC A61B 18/14 (2013.01) [A61B 90/03 (2016.02); A61B 2018/00172 (2013.01); A61B 2018/00482 (2013.01); A61B 2018/144 (2013.01); A61B 2018/1475 (2013.01); A61B 2090/035 (2016.02); A61B 2218/002 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An endoscope treatment tool comprising:
a flexible sheath;
a wire that is inserted into the sheath;
a treatment unit that is provided at a distal end of the wire;
a connector body having a tubular shape to which a proximal end of the sheath is connected;
a water injection connector that is provided at the connector body; and
an operation part body that is connected to a proximal end of the connector body and moves the wire forward and backward in an axial direction of the sheath such that the treatment unit projects and retracts from a distal end of the sheath,
wherein the connector body is connected to the operation part body such that the connector body is rotatable around a rotation axis,
the operation part body includes a rotation stopper and a sliding contact surface,
the connector body includes an abutting surface, and
the connector body is capable of transitioning between a rotation restricted state, in which the abutting surface abuts the rotation stopper such that a rotation direction of the connector body is restricted to be rotatable only in one direction, and a rotation allowed state, in which the abutting surface abutting the rotation stopper is released and rotation of the connector body in both directions is allowed, by rotating with respect to the operation part body, wherein a central axis of the water injection connector extends in a horizontal direction orthogonal to the rotation axis,
wherein the sliding contact surface and the rotation stopper restrict the abutting surface of the connector body in the rotation restricted state.